Hi Tom and rharv.

Yeah, it's right that when you go to open a file in PT one of the file type options to view is BiaB and so I suppose you should be able to do that. Is it possible that PT will only open BiaB files which contain just MIDI tracks, so that you can add your own audio?

Just a shot in the dark. I've no way of checking, but perhaps you can?
Still thinking about the other thing!

ROG.